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An upflow anaerobic sludge digester

An upflow anaerobic and digester technology, applied in sludge treatment, biological sludge treatment, waste fuel, etc., can solve the problems of low ability to degrade organic matter and produce biogas, long hydraulic retention time, and high energy consumption. Achieve the effects of saving energy consumption, improving mass transfer conditions, and shortening HRT

Inactive Publication Date: 2011-12-28
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention proposes an upflow anaerobic sludge digester, which is to solve the problem that ordinary sludge digesters have relatively low ability to degrade organic matter and produce biogas when treating urban sludge, long hydraulic retention time, and high energy consumption. An Improved Digester

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  • An upflow anaerobic sludge digester
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  • An upflow anaerobic sludge digester

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Embodiment Construction

[0012] The structure of the upflow anaerobic sludge digester provided by the present invention includes a digester main body 16, a mud inlet pipe 1, a mud outlet pipe 12, and a biogas pipe 10 arranged on the top of the digester. A reaction zone 2 is provided at the lower part of the digester main body 16, a filler 14 is provided at the top of the reaction zone, a biogas aerator 15 is installed at the bottom of the reaction zone, and is connected with a biogas pump 13, and in the middle of the digester main body 16 The upper part is provided with a downflow zone 6 and a settling zone 8, the upper part of the settling zone 8 is provided with a supernatant liquid pipe 9, and the upper part of the digester main body 16 is provided with a gas-liquid separation zone 5; the reaction zone 2 passes through the upflow tube 4 is communicated with the downflow area 6, most of the sedimentation area 8 and the downflow area 6 are separated by partitions, the bottom is connected through the d...

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Abstract

The invention relates to an up-flow anaerobic sludge digester, and the digester is the new digester which is designed for solving the problems that when the ordinary sludge digester carries out the treatment of urban sludge, the capacities of degrading organic matters and producing methane are relatively lower, the hydraulic retention time is longer, the energy consumption is greater and the like. The part of a main body mainly comprises a reaction area, a down-flow area, a precipitation area and a gas-liquid separation area. In addition, a guide plate, an up-flow pipe, a down-flow pipe and other important structures are further arranged in the main body. The fluid circulation is formed between the reaction area and the precipitation area by relying on the methane to form the density difference between the interior and the exterior of the up-flow pipe, thereby greatly improving the mass transfer condition. A filler is arranged in the reaction area, thereby improving the concentration of anaerobic microorganisms in a reactor and ensuring the high efficiency. Sludge and liquid are drained respectively, thereby being conductive to connecting with the follow-up treatment process and maintaining the concentration of the anaerobic microorganisms in the digester. Test results show that the digester has prominent advantages of improving the degradation of the organic matters in the sludge, promoting the conversion to the methane, realizing the short HRT, saving energy consumption and the like.

Description

technical field [0001] The invention relates to an upflow sludge anaerobic digester, which belongs to the technical field of sludge treatment. Background technique [0002] Anaerobic digestion can realize the reduction, harmlessness and stabilization of sludge, and can recover biogas. It has always been one of the most important sludge treatment methods. However, under the existing technical conditions, sludge digestion has problems such as high viscosity and poor mass transfer. At present, the sludge anaerobic digesters widely used in the world are complete mixed reactors, and their reaction rate is low. For sludge digestion, the residence time (HRT) reaches 20-30 days, and its organic matter degradation ability and transformation The capacity for biogas is also lower. After digestion, the sludge and anaerobic sludge cannot be separated, which makes it difficult to maintain the concentration of anaerobic sludge in the reactor at a high level, and also causes the reaction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/04
CPCY02E50/343Y02E50/30Y02W10/20
Inventor 吴静姜洁
Owner TSINGHUA UNIV
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